atterbury



(No Model.) 2 Sheets- 811061; 1.

B. J. ATTERBURY. ORB PULVERIZER, GOLD SAVER, AND MINERAL GONGENTRATOR.

No. 511,871. Patented Jan. 2, 1894?.

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(No Model.) 2 Sheets-Sheet 2 B. J. ATTERBURY. ORE PULVBRIZER, GOLD SAVER, AND MINERAL CONOENTRATOR.

Patented Jan. 2, 1894.

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BASIL J. ATTERBURY, OF BRIXTON, ENGLAND.

ORE-PULVERIZER, GOLD-SAVER, AND MlNERAL-CONCENTRATOR.

SPEGIFICATION forming part of Letters Patent No. 51 1,871, dated January 2, 1894.

Application filed July 28, 1893. Serial No- 4=8l,'7l6- (No model.)

To aZZ whom it may concern:

Be it known that I, BASIL JOHN ATTER- BURY, a subject of the Queen of Great Britain, residing at 50 Saltoun Road, Brixton, in the county of Surrey, England, have invented certain new and useful Improvements in and Relating to Ore-P ulverizers, Gold-Savers, and Mineral-Concentrators, of which the following is a specification.

This invention relates to a machine for pulverizing quartz or other ore, for saving free gold, for the concentration of other minerals and metals, and for pulverizing basic slag, talc and other similar materials at a less expense and more effectively than can be done by the machines at present in use.

The machine consists of a rocking cradle divided into two or more chambers at different heights in each of which there is or are one or more free rollers. The material after passing under one roller is successively passed under the other rollers of the series (the number of the chambers and rollers to each machine or plant being determined by the character of the work to be done), while the saving of the free gold or silver and concentration of minerals is effected by the interposition of riifies between each roller and chamber.

As the operations of crushing ores, which are usually pulverized in a wet condition, and grinding cement and similar materials, which must be absolutely dry, are in some respects different, I will describe the manner in which my invention is to be worked in each case. The chambers are lined with plates of steel or any other suitable metal. When it is required to pulverize ores or other materials by the wet process the material to be treated is fed into the machine at the upper end into the hopper which is provided for the purpose; it falls under the first roller which at the upper end may be provided with a beveled edge and after being crushed sufficiently fine is carried down by the water-introduced in a fan-shaped jet under the rollerover the riffles at the lower end of the chamber. When ore bearing free gold or silver is being passed through the machine, copper plates may be inserted between the chambers and mercury being placed in the riffies the free gold or silver is amalgamated. When minerals are be= ing concentrated without mercury, the copper plates may be dispensed with. This operation maybecarried on under an indefinite number of rollers according to the degree of fineness required, though generally speaking and for all practical purposes the degree of fineness to which the material may be crushed maybe regulated by the supply of water. Gratings may be placed after any or all of the rollers and above the riffies so that no material can pass another roller until it has been crushed to a sufficiently fine degree. In the second, and when more than two chambers are used, the subsequent chambers, the material is so fine that a large quantity or proportion is held in suspension, and the splash requires to be confined. To effect this a splash-board of wrought iron plate or other suitable material is bolted along the top of the chambers. In order to remove the material as fast as it is crushed, side splash chambers fitted with suitable gratings or screens are provided at the sides of the chamber each having a drain to permit of the wash getting away. Another grating as before alluded to is also placed at the end of the chamber. WVith aviewto saving any amalgam that may be thrown out an amalgamating table may be bolted on to the end of the last chamber. For dry crushing and pulverization the whole of the machine is closed in and made practically air tight. The riffies are dispensed with and a greater fall is given from one chamber to the next. Under each roller is introduced a jet of air or the material may be drawn through by exhaust. The fine dust is collected by means of a collector and the bulk is passed through a chute over any suitable screen and the fine stuif bagged while the coarse may be carried by an elevator back to the hopper to be reground.

Another method by which the material may be passed along and at the same time be effectively ground is by making the door of the chamber slightlyinclined to the month whereby the material will havea fall and the action of the roller working up toward the top of the chamber in accordance with a well-known law, will keep pushing the material down as it is ground.

In place of being made cylindrical as shown the rollers and their beds may be slightly conical.

In order to remove the necessity of employ IOC ing stone breaking machinery when only one or two machines are used the first roller may be corrugated by which means it will be found that the machine can be fed with stone up to four or even five inchescubeand these lumps will be broken down and pulverized.

The rocking of the machine is effected by means of a bar or beam placed across the top of one of the chambers and connected at the other end to suitable driving gear.

Figure 1 is a longitudinal vertical central section of a three chamber machine adapted for Wet grinding. Figs. 2 and 3 are transverse sections of the same on the lines 22 and 33 Fig. 1 respectively. Fig. 4 is a (liagram View showing the method by which the cradle is rocked.

(1 is the cradle preferably made in three castings bolted together as shown.

I) are rockers on the under side of the eradle working on rails c.

d are safety pins for preventing longitudinal motion of the cradle. They pass through holes in the rails and enter slots Z) in the rockers.

e are partition plates across the top of the cradle cast in one piece with the sections and f are transverse stays secured by bolts 7. The upper section has two stays f but the other sections have only one the second being replaced by a projection c at the bottom of the partition 6. These stays and projections serve to limit the longitudinal play of the rollers of which there is one in each section the upper one only however being shown in the drawings. Each roller is built up of a ring 9 of chilled iron or hard steel having inside the lugs g which are received in slots formed in the two filling pieces g the whole being secured together by the bolts g and nuts 9 The latter are received in three of six recesses g in each filling piece 9 These recesses enable the rollers to be taken hold of to be lifted out. The portion of the cradle beneath each roller is lined with a plate of steel h whose upperedges are secured by bolts and nuts h. Between the chambers or portions of the trough containing the rollers are inclined corrugated surfaces or rifiles formed inside the trough. v

WVhen the apparatus is to be used for metals capable of being amalgamated these riffles are lined with amalgamating copper plates which are hammered into and fit the corrugations. The upper ends of the plates 70 are secured by bolts and nuts (not shown in the drawings) in such manner'that they can be readily unfastened and lifted out so as to be replaced by fresh plates. The third and subsequent compartments (if there be any) have openings at each side leading into in what manner the same is to be performed, 7

I declare that what I claim is 1. The combination of a trough, means for rocking the trough, compartments in the trough, the bottom of each compartment forming a continuation of a preceding compartment, and being lower than that of the preceding one, and a roller or rollers in each compartment.

2. The combination of a trough, rockers on which it is mounted, means for rocking or oscillating the trough, compartments in the trough, a continuous bottom for all of the com partment-s, so arranged that the bottom of each compartment is lower than that of the preceding one, and a roller or rollers in each compartment.

3. The combination of a trough, means for rocking the trough, compartments in the trough, the bottom of each compartment being lower than that of the preceding one, riffles or collecting surfaces between the compartments, and a roller or rollers in'each com; partment. i

4:. A trough having a continuous bottom, and divided into several compartments, the bottom of each compartment being lower than that of the preceding one, in combination with riffles arranged on the bottom, between the compartments, and a roller or rollers in each compartment.

5. The combination of a trough, means for rocking the trough, compartments in the trough, the bottom of each compartment being lower than that of the preceding one, riffles or collecting surfaces between the compartments, chambers in the sides of the compartments, strainers between the compartments and chambers, passages leading from the chambers to above the riffles or collecting surfaces and a roller or rollers in each compartment.

- BASIL J. ATTERBURY. Witnesses:

T. F. BARNES, GEO. J. B. FRANKLIN, Both of 17 Gracechurch Street, London, E. O. 

